JPH077575B2 - Data storage system of data processor - Google Patents

Description

The present invention relates to a data storage system of a data processing device for editing / storing / reproducing time series data observed in online real time.

(B) Conventional technology Conventionally, in a data processing device that stores data observed in time series in real time and performs processing such as editing / playback, in order to store the time series data, an external storage such as a magnetic disk is used. Sequential files are created in the device and observation data are stored sequentially.

(C) Problems to be Solved by the Invention In the above conventional data storage method, time-series data is sequentially
It is stored in a sequential file, and if a failure occurs in the observation instrument or data processing device and the storage operation is temporarily stopped and then restarted, the observation data is stored from the beginning of the file or Since the data is stored next to the stored data, there is a problem that it is not possible to determine the discontinuity where the data for a certain period is missing or where there is no data that could not be observed due to a failure.

In view of the above, it is an object of the present invention to provide a data storage system which does not cause data loss at the time of restart due to the occurrence of a failure and can clearly grasp the period of no observation data due to the failure.

(D) Means and Actions for Solving Problems The data storage method of the data processing device of the present invention is a storage medium that is updated every unit period (eg, 1 day) and at each time within the unit period. From the key file that stores the data and the relative block address where the captured data of each time is stored for each time, and the data file that is addressed by the relative block address of this key file and that stores the captured data of the corresponding time. The following random data is configured and the captured data at each time is fixedly stored corresponding to the time.

In this data storage method, the area where the fetched data is stored is determined according to the time, so if there is no fetched data due to a failure, the data file of the relative block address specified by the key file from the fetched time is ,
No data is stored. Therefore, by reproducing the stored data, it is possible to immediately know at what point the discontinuity has occurred. Also, within the unit period, since the captured data is stored corresponding to the time, a temporary failure occurs,
Even when it is restarted, it is stored in the relative block address corresponding to each capture time, so that data is not redundantly stored, and therefore the data up to that point is not lost.

(E) Examples Hereinafter, the present invention will be described in more detail with reference to Examples.

FIG. 1 is a block diagram of an observation data storage device showing an embodiment of the present invention. In this embodiment, the sensor 1
Observation signals from _-1 , 1 _-2 , 1 _-3 , ..., 1- _n are added to the multiplexer 2 and input to the A / D converter 3 at predetermined sampling periods and in time division, and digital values are input. Is converted to, and taken into CPU4 as observation data.
It is temporarily stored in the built-in memory 4M.

The CPU 4 has a magnetic disk 5 for further storing one day's observation data, a display 6 for displaying the observation data, and a console having various keys for designating the observation mode, reproduction mode, and edit mode, and various keys. The disk 7 is connected.

Sensor 1 _-1, 1 _-2, 1 _-3, ..., 1 observed the data is of _-n, as described above, but is temporarily stored in the internal memory 4M of CPU 4, as shown in Figure 2 , When the data (B ₁ , ..., B ₁₂₈ ) for 128 times of n sensors is stored in the internal memory 4M, the data is collectively transferred to the magnetic disk 5,
Is stored. The magnetic disk 5 constitutes a key file 5a and a data file 5b. As shown in FIG. 3, the key file 5a contains data (SS: seconds, D
D: day, MM: month, YY: year, HH: hour, FF: minute), the number of data in one block (COUNT), and the start relative block address (ADRP) of one record code are stored.

Therefore, every time data of 128 times is stored in the internal memory 4M of the CPU 4, this data is stored in the position of the relative block address assigned to the magnetic disk 5 at that time. That is, the observation data is stored at a fixed time.

Now, assuming that the number of sensors is n = 60, 1 block = 512 bytes (1 sector = 256 bytes), and data for a maximum of one day can be stored, the sampling time of acquisition of observation data is set to 3 seconds and the internal memory 4M The time required for one record to be transferred and stored on the magnetic disk 5 is 3 seconds × 128 = 384 seconds, and the maximum number of records, that is, the number of records per day is 24 hours × 3,600 seconds / 384 seconds = 225. Since one record requires 512 bytes x 60 = 30,720 bytes, it is sufficient to secure a data file with a maximum capacity of 30,720 x 225/256 = 27,000 sectors.

In this embodiment, the n sensors 1 _-1 , 1 in the observation mode are
_-2, 1 _-3, ..., with 1 _-n observation data is temporarily stored in the internal memory 4M, every predetermined time, the internal memory 4M
Data is transferred and stored on the magnetic disk 5, and the observation data is fixed and stored corresponding to the time.

When playing back the observation data, specify the playback mode on the console disk, time, sensor No., and display range, and then select the internal memory 4M and / or magnetic disk 5, or either, according to the specified range. The obtained data is derived to the display buffer and displayed on the display 6. For example, as shown in FIG. 4, data changes are displayed centering on a designated time.

Further, in this embodiment, since the magnetic disk 5 is used for storing files for one day, the data for each day can be managed by the magnetic disk, and the data arrangement of each magnetic disk within the day is the same, so the operation is easy. .

(F) Effect of the Invention According to the present invention, since the time-sequential captured data is fixedly stored at the time, when the input of the captured data is stopped, the data up to that time is saved when restarting. Since the data is not lost and the data corresponding to the time during the suspension period is not stored, the presence or absence of the suspension and the suspension period can be easily determined. Further, by designating the time, the designated time becomes a key, and the required data can be easily reproduced.

[Brief description of drawings]

FIG. 1 is a block diagram of an observation data storage device showing an embodiment of the present invention, FIG. 2 is an explanatory diagram for explaining data transfer from an internal memory of the device to a magnetic disk, and FIG. FIG. 4 is a diagram showing the data arrangement of the key file of the magnetic disk, and FIG. 4 is a diagram showing a display example at the time of reproduction by the embodiment apparatus. _{1 -1 · 1 -2 · 1 -3} ... 1 -n: Sensor, 4: CPU, 4M: internal memory, 5: magnetic disks, 5a: key file, 5b: Data file.

Claims (1)

[Claims] 1. A data storage system for a data processing device, which receives input data in time series and stores the data in a storage medium, the storage medium comprising a random file updated every unit period, and the random file being updated. The file is a key file that stores the relative block address at which each time data within the unit period and the capture data at each time is stored, and the relative block address of this key file is addressed, and the corresponding time is captured. A data storage method of a data processing device that is configured with a data file that stores data, and that capture data at each time is fixedly stored corresponding to the time.